How can I instance linked assets with attached armatures?
I solved my problem by trying out and want to share my solution.
Using &quot;Duplicate Linked&quot; is exactly what I was trying to achieve:

After rename and reparent the linked collection I could individually pose each door:

The armature, the mesh and all materials are linked to the asset library file and changes are reflected in the movie file.
Hope to help others with same problem :-)
Greetings